Circuit-breaker for reversible motors



L. E.SAMUEL.

CIRCUIT BREAKER FOR REVERSIBLE MOTORS. APPLICATION FILED APR. 17, 1920.

1,399,801 Patented Dec. 13, 1921.

WITNESS IN V EN TOR A TTO; NE YS UNITED STATES PATENT OFFICE.

LESTER E. SAMUEL, OF BROWNSVILLE, OREGON,

CIRCUIT-BREAKER FOR REVERSIBLE MOTORS.

Application filed April 17,

To all whom it may concern:

Be it known that I, LESTER E. SAMUEL, a citizen of the United States,residing at Brownsville, in the county of Linn and State of Oregon, haveinvented a new and useful Circuit-Breaker for Reversible Motors, ofwhich the following isa specification.

My invention relates to improvements n circuit breakers for reversiblemotors, in which a manually operated switch starts the rotation of amotor in either direction, while the stopping, after a certain number ofrevolutions, is accomplished automatically.

The objects of my invention are to produce an apparatus, which willoperate window shades, window sashes, fire doors, re volving shutters,etc., from a distance.

I attain these objects with the mechanism illustrated in theaccompanying drawing in which I Figure I is a plan of the essential elements with the complete wiring diagram.

II is a section through Fig. I along the line aa showing in sideelevation the circuit breaker which stops the motor automatically.

Similar numerals refer to similar parts throughout the several views.

The electric current, issuing from the wire 1 of the main circuitproceeds as follows: wire 2, blade 3 of the knife switch a, wire 5, tothe motor 6, setting the latter in rotation, issuing from there throughthe wire 7, into the blade 8 of the knife switch, through the wire 9,into the roller shaft 10, and the roller 11. The latter being inmetallic contact with the circuit breaker 12, the current proceedsthrough the circuit breaker 12, the shaft 13, and the wire 14;. backagain into the wire 15 of the main circuit. But, since the circuitbreaker is driven from the motor 6 by suitable gears on the shafts 16and 17, and since at one place of the circumference of the circuitbreaker an insulating strip 18 is attached to said circuit breaker. theroller 11 will land eventually on the insulating strip, and interruptthe flow of current and therewith the rotation of the motor 6.

Throwing now the knife switch 4 in the Specification of Letters Patent.

Patented Dec. 13, 1921.

1920. Serial No. 374,716.

opposite direction (indicated in dotted lines) will establish thefollowing circuit: Wire 1, wire 19, blade 3, wire 19 motor 6, causingrotation in opposite direction, wire 20, blad 8", wire 21, shaft 22,roller 23, (see Fig. II) circuit breaker 12, shaft 13, and finallythrough wire it back into the main circuit 15. Rotation of the circuitbreaker will proceed until roller 23 lands on the lnsulating strip andstops rotation of the motor. Roller 11 being brought again in metalliccontact with the circuit breaker permits then also passage of electriccurrents when the switch is thrown into the position first described.

Thus the motor, after having performed a certain number of revolutionsstops automatically. The ends of the roller shafts 10 and 22, where therollers 11 and 23 are attached, should possess some flexibility.

The tension springs 24: insure positively contact of the rollers 11 and23 with the. rim of the circuit breaker 12.

The device which needs winding and unwinding may be attached in anysuitable manner either to the shaft of the motor 6 or to any of theshafts 13, 16 or 17 I claim:

In a circuit breaker, the combination of a rotary circuit breaking wheelhaving a strip of insulating material across its periphery, two contactwheels traveling on said periphery, flexible shafts supporting thecontact wheels, tension springs attached to the flexible shafts to pressthe contact wheels against the periphery of the circuit breaking wheel,a reversible motor, a train of gears between the motor and the circuitbreaking wheel, two electric circuits for operating the motor in eitherdirection. each circuit having a separate contact wheel but having thecircuit breaking wheel in common, a manually operated switch to send anelectric current through either one of the circuits, said current beingautomaticalh interrupted when one of the contact wheels arrives on theinsulating strip of the circuit breaking wheel.

Signed by me at Portland, Oregon, this 12th day of April, 1920.

LESTER E. SAMUEL.

